X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=glaze.c;fp=glaze.c;h=72070256fb4365d6874ba58a3d28f94495c5f9e9;hb=cec0694a7f219bd3590e6a04beba34ca45539540;hp=0000000000000000000000000000000000000000;hpb=0b190cc8fbca0f970eadd8c0f1d5792c41f71cf6;p=glaze

diff --git a/glaze.c b/glaze.c
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+++ b/glaze.c
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+/* Copyright © 2013, Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#define _GNU_SOURCE
+#include <dlfcn.h>
+
+#include "glaze.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+void *
+glaze_lookup (char *function)
+{
+	static void *libgl_handle = NULL;
+	void *ret;
+
+	if (libgl_handle == NULL) {
+		const char *path;
+
+		path = getenv ("GLAZE_LIBGL");
+		if (path == NULL) {
+			fprintf (stderr, "GLAZE_LIBGL unset. "
+				 "Please set to path of libGL.so under glaze.\n"
+				);
+			exit (1);
+		}
+
+		libgl_handle = dlopen (path, RTLD_LAZY | RTLD_GLOBAL);
+		if (libgl_handle == NULL) {
+			fprintf (stderr, "Error: Failed to dlopen %s\n", path);
+			exit (1);
+		}
+	}
+
+	ret = dlsym (libgl_handle, function);
+
+	if (ret == NULL) {
+		fprintf (stderr, "Error: glaze_lookup failed to dlsym %s\n",
+			 function);
+		exit (1);
+	}
+
+	return ret;
+}